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(C) The cardiac impulse originates in the $SA$ (Sinoatrial) node,which acts as the natural pacemaker of the heart.From the $SA$ node,the impulse trave

Vedclass · Accepted Answer

$SA$ node $\rightarrow$ $AV$ node $\rightarrow$ $AV$ bundle $\rightarrow$ Purkinje fibers

Vedclass · Answer

(C) The cardiac impulse originates in the $SA$ (Sinoatrial) node,which acts as the natural pacemaker of the heart.From the $SA$ node,the impulse travels to the $AV$ (Atrioventricular) node.From the $AV$ node,the impulse is transmitted to the $AV$ bundle (Bundle of His).Finally,the impulse spreads through the Purkinje fibers to the ventricular walls,causing ventricular contraction.Therefore,the correct sequence is: $SA$ node $\rightarrow$ $AV$ node $\rightarrow$ $AV$ bundle $\rightarrow$ Purkinje fibers.

Select the correct pathway for the transmission of impulses in the heart.

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